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DOE OSTI · 1888049

High field magnetometry with hyperpolarized nuclear spins

Sahin, Ozgur·de Leon Sanchez, Erica·Conti, Sophie·Akkiraju, Amala·Reshetikhin, Paul·Druga, Emanuel·Aggarwal, Aakriti·Gilbert, Benjamin·Bhave, Sunil (ORCID:0000000171932241)·Ajoy, Ashok (ORCID:0000000332422913)
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Abstract

Abstract Quantum sensors have attracted broad interest in the quest towards sub-micronscale NMR spectroscopy. Such sensors predominantly operate at low magnetic fields. Instead, however, for high resolution spectroscopy, the high-field regime is naturally advantageous because it allows high absolute chemical shift discrimination. Here we demonstrate a high-field spin magnetometer constructed from an ensemble of hyperpolarized 13 C nuclear spins in diamond. They are initialized by Nitrogen Vacancy (NV) centers and protected along a transverse Bloch sphere axis for minute-long periods. When exposed to a time-varying (AC) magnetic field, they undergo secondary precessions that carry an imprint of its frequency and amplitude. For quantum sensing at 7T, we demonstrate detection bandwidth up to 7 kHz, a spectral resolution < 100mHz, and single-shot sensitivity of 410pT $$/\sqrt{{{{{{{{\rm{Hz}}}}}}}}}$$ / Hz . This work anticipates opportunities for microscale NMR chemical sensors constructed from hyperpolarized nanodiamonds and suggests applications of dynamic nuclear polarization (DNP) in quantum sensing.

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73 NUCLEAR PHYSICS AND RADIATION PHYSICSquantum metrologysolid-state NMR

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Sahin, Ozgur, de Leon Sanchez, Erica, Conti, Sophie, Akkiraju, Amala, Reshetikhin, Paul, Druga, Emanuel, Aggarwal, Aakriti, Gilbert, Benjamin, Bhave, Sunil (ORCID:0000000171932241), Ajoy, Ashok (ORCID:0000000332422913). 2022-09-19. High field magnetometry with hyperpolarized nuclear spins. https://doi.org/10.1038/s41467-022-32907-8

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